acids and bases
DESCRIPTION
acids and bases!TRANSCRIPT
WHAT ARE ACIDS?
Acids produce hydrogen ions in water.
Example of an acid (HA) in solution
A-H+
H+
A-
A-
H+
H+
A-
WHAT ARE BASES?
They are metal oxides or metal hydroxides.
Examples:
Sodium hydroxide (NaOH)
Copper (II) oxide (CuO)
Copper (II) Oxide
NaOH
Can you name some other examples of
bases?
SOLUBLE BASES
Soluble bases are called alkalis
Alkali dissolves in water to produce hydroxide (OH-) ions
Example:
NaOHNa+
OH-
Na+
OH-
Na+
OH-
Na+ OH-
WHAT HAPPENS WHEN ACID REACTS WITH A
BASE?
Let us visualize the changes that takes place on the molecular level!
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ACID AND BASE REACTION
The reaction between an acid and a base is called neutralisation.
Example 1:
Sodium hydroxide + hydrochloric acid Sodium chloride + water
Now, let’s write the chemical equation!NaOH + HCl NaCl + H2O
ACID AND BASE REACTION
Example 2
Copper (II) oxide + sulfuric acid copper(II) sulfate + water
Now, let’s write the chemical equation!CuO + H2SO4 CuSO4 + H2O
SUMMARY: NEUTRALISATION
REACTION Acid + Base Salt + water
Ionic Equation:
H+ (aq) + OH- (aq) H2O (l)
CAN YOU ALSO… DRAW YOUR OWN CONCEPT
MAP!?!Group leaders:
•Create a mindmap on mindmeister •Invite your group mates
All members of the group:
•Contribute to the concept map •Post the finalized copy of concept map onto your pbwiki group
THE END…